Development one callback application at blackberry platform.
When user dials one number , will be prompted to use normal GSM method or Callback method.
When user choose callback method, application should send one http request to background callback server(server is ready).
Future, we plan to add SMS and SIP function.
7 freelancer bu iş için ortalamada 1282$ teklif veriyor
we have very strong experience on blackberry,just see our first blackberry app SWeather in main land of china.http://weather.seasou.com/screenshot.php.